What happened to ?tp=1 in Joomla 1.6?

As an example, take a look at http://www.compassdesigns.net/?tp=1. You will see a series of module positions on the home page of this website. Not all of them are in use. For example, the module position of debug at the bottom of the page is not used. However, you have a sense of what’s available for module positions, as well as where they are located within a given design.

By default, in Joomla 1.5, you could add ?tp=1 to the end of the home page URL and see these positions. If you wanted to turn this off, you needed to add a chunk of code to your .htaccess file, as follows: